Spring-adjusting device.



No. 832,064. PATENTED 0012,1906.

H.- E; KEELER." SPRING ADJUSTING DEVICE.

APPLICATION FILED JULY 3, 1905.

FNVQENTOR BY M M TTORNEYS T UNITED STATES HERBERT E.-KEELER, or New YORK; it. if.

SPRlNG-ADJUSHNG DEVECE,

' Spdciflcation of Letters Patent.

Patented Oct. 9, 1906.

Application filed July 3.1905. Serial 11 268,222.

' New York'city, in the county andState of NewYork, have invented certain-new and useful Improvements in S -Ad'ust' Devices, of which thefollowiiig ii a spiecifi dii tion, taken in connection with the accompanying drawings, which form a part of'the same Thisinvention relates to spring-adjusting devices, .and relates especially to. devices for -act' cur-' tain-rollers and for indicating t e tenslonof such springs.

- In the accompanying drawings,'showing an illustrative embodiment of this invention, and in which the same reference-numeral refers to. sim1lar parts in the several figures,

Figure 1 IS a ers'pective vlew showmg an,

embodiment 0 this invention in relation to a curtain-roller. Fig. 2 is a longitudinal sectional view of this device, and Fig. 3 shows a transverse section of the same.

In theillustrative embodiment of this invention shown in the drawings a suitable holder is indicated to engage and preferably to securely grip the spindle end which projects from a curtain-roller and is attached to a spring within the same or to enga e any other spring-actuated device. Sucha older 1 may be formed with the socket 3 of rectangular cross-section to conformto the shape of the spindle end, and this holder is also preferably provided with gripping means, which may take the form of the grippingscrew 2, which can be readily set down and gri the spindle end to securely retain'it wit the holder. This holder is indicated as provided with a stud 10, extending within the actuator, which may take the'form of a crank-casing7,'closed at its otherside by a plate 8, secured thereto. A suitable bolt 13 is shown assing through the actuator-casing and holding the stud in proper rotative relation thereto. f p 4.

As indicated in the drawings, the actuator may be conveniently given. the form of the crank-ca 7 and is preferabl? provided with a suita 1e handle 9, rotataby mounted at the free end of the actuator by a suitable; bolt 16, althou h this form of actuator isnot necessary in a cases. Any suitable yieldable connection may be arranged between the holder and 'actuator so as to allow a relative movement between the two and to make possible the convenient indication of the torque orturning ower between these two elements. A suita 1e reflexed sprin 4 is mdicated for this purpose, and, as s own in Figs. 2 and 3, this spring is secured at one end to the holder-stud 10 by the screw 11 and at its other end to the actuator b the screw 12.

Bygiving this spring a refiexe form, as indicated, the desired elasticity can readily be obtained and the connection given a suitable yielding character. In order to indicate the extent of movement between the holder and actuator, the indicator 5, secured to the holder, coo erates with a suitable scale 6, which can e conveniently arranged on the circumferential or lateral face of the actuator, and in this position it is readil observable by the o erator usin this scale can e convenient marked off 111 sultahle subdivisions to indicate in foot-pounds ,or otherwise the turning force hetweenthe holder andactuator, which of course corresponds exactly at that time with the turning force or strength of the spring 1'5 in the curtain-roller 14, connected with the device In.'using this spring-adjusting device the s indlee'ndof the curtain-roller is inserted in tile socket of the holder and may he firmly retained therein by, setting down the gripping-screw u on it. The actuater 18' then rotated by t e handle so that the rollerspring is wound up to the desired extent and evice. This I its tension adjusted to theprcper amount as 4 indicated by the cooperating indicator and scale on "the adjustin device. Then after the pawl or other hol ing meansfin the curtain-roller has been brought into play to prevent the spring unwindingtheadjusting dc vice is removed and the curtain-roller is ready for use.

Having described thisinvention in connection with an illustrative embodiment thereof, to the details of which I do not desire to be limited, .what I claim as new, and what I desire to secure by Letters l ?atent, is set forth in the'appended claims. I

1. In spring-adjusting-devices, a crankcasingprovided with a handle at its free end, 'a'holder having a stud-revolubly retained said crank-hasin said holder having a projecting end provi ed with a socket to accommodate the end of a spring'or springactuated device anda grippin -screw cooperating with said socket, an in 'cator on said holder cooperating with a scale on the circumferential part of said crank-casing and a refieXed spring within said casing connected to said holder and said crank-casing.

2. In spring-adjusting devices, a crankcasing provided with a scale, a holder having a socket and grip ing means cooperating with said socket, said holder being revolubly mounted with respect to said casing and provided with an indicator cooperating with said scale and a yielding connection between said holder and said casing.

3. In spring-adjusting devices, a holder to engage a spring-actuated device, acrank-actuator in which said holder is permanently and revolubly mounted, a yielding connection between said holder and said actuator eaaoea 4. In spring-adjusting devices, an actuator comprisin a hollow cranlccasing and a handle, a hol er revolubly mounted in said actuator and having projecting means to engage a spring-actuated device, a yielding connection between said actuator and said holder and located within said actuator and indicating means to show the extent of movement between said holder and actuator.

HERBERT E. KEELER. Witnesses:

HARRY L.'DUNOAN, JEssrE B. KAY. 

